I have 2 questions. 1)Can you link Sonic Advance 2 to SA2:Battle? 2)Does Sonic Advance 2 have a language setup in japan (like if I have it english and I want to put it in japanise)?
1) Yes, it has a Chao Garden system that can hook up to SA2 Battle.
2) Yes, it has an onboard translator.

~ SA Tails